Sounds like everyone is over panicking. The LT40 is a strong plane. I know, I had one as my trainer. There is one at our field with a 61 in it, not sure what brand engine and he does knife edge with his LT40 at 10 feet over the runway! The plane isn't much faster with the bigger engine but the vertical pull factor and the climb rate is impressive! Only down side I see is that you will need a bigger fuel tank or you can expect short flights. If you go this route, make sure that your control surfaces are pinned in. Personally though, there are planes that would be a much better match for that size engine. [8D]